Electric switch



Dec. 13, 1927.

G. W. OKEEFFE ELECTRIC SWITCH Filed Deb. 21. 1922 5 Shets-Sheet l Dec. 13, 1927. 1,652,321

G. w. OKEEFFE ELECTRIC SWITCH Filed Dee. 21. 1922 will/l Dec. 13, 1927. 1,652,321

. G. W. OKEEFFE ELECTRIC SWITCH Filed Deo, 2l 922 eet 5 jz veno. SP3 MW' Patented 13, ljll..

unirse stares l,ti52,321

BATEN'E QFF'ICE.

GEGRGE 'WY OKEEFFE, OF DRCHESTER, M'ASS CUSETTS, .'5.'SSIGI\TOR, BY MESNE AS- SIGNMENTS, 'E0 CN'DT ELECTCL NU.. iCTURlilG.CRPORATONQ DF BOSTON,

Application filed December 2l, 1922. Serial No. 668,302.

'fs invention relates to electric switches ed to control small motors and the like, as particular reference to electrically ed switchcfi.

electrically operated iin include an actuating coil wiich is to effectA the closing-and opening switch and said coil may be governed by remotely disposed control switches.

switch may adapted ot the it is an object of this invention to provide an electrically operated switch with means by Vwhich the switch may also he controlled manuaily upon iailiiire oi the actuating coil to operate, or tor other purposes.

A. vfurther object is to provide switch operating mechanism and an actuating coil thereifor vadapted to be energized to Operate the mechanism and close th switch and hold the itch closed lor so long as the coil is energized; and said mechanism is or may he so arranged 'that it may be o ieratcd manually and locked in switch closed position released menually to provide a rapid opening of the switch. @all operating mechanism may further be so sranged that ii: set manually into switch-closed position and the actuating coil becomes energized, the mechanism will become u set and biased towards switch-open position in readiness to open the switch when the actuating coil is deencrgined.

n. i'uitl er object is to provide improved means governed by an overload to de-ener gizo the actuating coil and effect the opening of the. switch.

i.- turther object is generaily to improve 'the construction and operation oi electric su itches.

The switch. embodying the invention may include a l'fionary switch men'ibor and a movable sv. ltch member. The switch operating mechanieni-may include actuating electro-magnet and a toggle operated by the armature oi the electro-magnet to actuate the inoval'ile switch member .ud toggle und q ...iure re or may he so arranged that toggle is ict ioclted in straightened powhen the armature is actuated by the t the actuating coil; `and the may consequently move to n when the a ituating coil energination or 2. 'l "l switch niemeer n positie the y ranged 'to be unset manuallywhereby to eifect the opening` movement oi the movable switch member when the actuating coil is out of service. Tie armature of the actuating coil is or may he also arranged to `unset toggle in the switch-closed position of the armature, it the switch has been set man ually, whereby when said coil `is cle-enern gleed, the switch will move to open position.

Fig. l is a iront elevation et an electric switch embodying my invention with a portion oit the enclosing casing broken away to illustrate the mechanism. f

` Fig. 2 isa plan view ot' Fig. l with a cover ofthe switch removed.

, Fig. 3 a. section along line 13H8 ot Fig. t. i

i.lig. 4t is an end view of the switch with the side wall of the enclosing casing broken away to illustrate the overload coils.

5 is a detail illustrating the switch operating mechanism.

Fig. 6 is an end view of the actuating coil.

Fig. 7 is sectionv along the line Yeot Fig. 5.

Fig. 8 is a diagram` illustrating the circuit connections between actuating coil.

9 is a sectional detail illustrating the method of securing a movable switch `memn ber tothe insulating operating bar.

Fig. l0 is a planview of a retainingplate for the operating shaft.

Fig. ll is a perspective view ot the overload coil supporting trame.

Fig. l2 is a section along line 12-12 oiE Fig. il.'

Fig. 13 is perspective view oi a lrnoclrout plate. l

is here shown. the switch embodying the invention may comprise acasing including the' upper casino' portion. l0 which may hai/e the reliexed strips il secured to the rear wall thereof, whereby 'to provide means for securing the svitch to a support. portion l@ may be provided with a cover which may include the cover portion l2 wnich is adapted to be iiXed more or less permanently to said casing end7 and the conithe switch and the Said casiiigy plementary cover portion 13 which is adapted to complete the closure ot said casing portion 10. Said cover portion 13 may be locked removably to the casing l by any suitable means as, 'tor instance, the loel: member 14;. The casing)` also includes the oil receptacle l which is received within and depends below the side walls ot the upper casing portion 10.

Said receptacle is adapted to contain oil in which the switch members and the tripping` coils are immersed. .An insulatingplate le ot' suitable material, as slate or porcelain. is received within the upper casing portion l() and is adapted to torni a cover tor the major portion ol' the oil receptacle. Said insnlatingplate may be secured to the easingl in any suitable manner, as, for instance, ears 17 may be reilexed inwardly from the lower edge of the casingl l0 and serve supports to which said insulating plate is secured. Said insulating` plate is adapted to support the movable and stationary switch members. The switch terminals and circuitA leads are adapted to be contained in the casingabove said insulating plate, and the switch members below said insulating plate.

The switch here shown is adapt \d lor the control ot a three phase electric circuit and, consequently, is or may be provided with three movable and stationary switch members. The number ot switch members may be varied, howe er, to suit the requirements ol any particular circuit to be controlled. The movable switch members are or may be identical in construction, lach movable switch member may include a U-shaped bracket- 20 which depends below the insulating plate 1G. Said bracket may be secured to said insulating plate by suitable means as the bolt 2l which has an enlarged head 22 received between the arms et said bracket. t'aid bolt may be extended through said plate and a nut 23 may clamp the bolt and the bracket in position. A terminal lugv 2l may also be secured to said bolt and may receive a circuit lead which may be extended into the top compartn'ient oit the casing` through suitable apertures in the side walls olf the easing'. For conveniently introducing the circuit leads into the switch casing7 said casing may be lormed with apertures through the walls 'ther-cot; and said apertures may be covered by lrnocleout plates 2li which may be secured7 preferably removably, to said walls over the a yertnres by the screws 2th. Said plates are or may be termed with knock-out portions 24C in a more or less customary manner; and said portions 2li are preferably smaller than the apertures in the walls ot' the casing. This arrangement provides means whereby two sizes el' conduits may be secured to the casing. The small conduit may be received in the aperture in the knock-ont plate torined by removine,` the knock-out portion 24 and the large conduit may be receivedin the aperture in the casing wall7 the plate 24e being removed tor this purpose.

The movable switch member may include the U-shaped or channel brush holder 25, the rip-turned arms et which are pivoted on the, pin 26. which latter s or may be extended through the lower end ol the arms ol" the bracket 2l). A conducting and supporting` strip 2T is received in said brush holder and extended Yforwardly tbercbeyond. A second conducting strip 28 is also received in said brush member above said lirst conducting strip 27 and is provided with a detachable Contact'. menibcr 29 on its lorward end. A brush member 30 is superimposed on said conducting member 28 and forms the main movable current carrying' member of the switch. Said brush member and strips 27 and 28 are secured to said brush holder by suitable means as the screws 3l. Said brush member is connected electrically to the bolt by means oli the tlexible braid 32 which is clami'ud to the brush member 30 by said screw 3l and is or may be soldered to the enlarged head 22 ot said bolt 2l. The movable switch members, so tar described, are or may be identical. A bar 38 oil suitable insulating' iiiaterial as wood secured to the brush holders whereby to operate them conjointly. Said securing means mayy l i as illustrated in Fig. 9 wherein each screw 8l may pass through said bar l?) into a recess 3l sunk in the upper tace oit said bar 33 and a. nut 35 may be thr tded on the upper end olf said screw 3l. A bracket 37 may be secured to the middle portion oit' said bar il?) and a connecting rod 3S may bc pivotally connected therewith, Said rod may extend upwardly through a slot in said insulatint;- plate 1G andinay be pivotally connected with an arm 39 which is laterally extended trom and secured. to an oi'ieratine shaftt 1l-O. Said operating' shaft may extend lransverf'iely across the upper portion ot the casiugi l() and may be ji'un'nalled in the rear wall ol' the casing; and extend upwardly beyond and be jonrnailed ir the bottom ol a slot ll formed in the Yfront wall and extended downwardly 'trom the top edge oit aid wall. t shaft-retainingr plate ft2 may be secured removably to the outel tace ot the lront wall olif said er" i5; l() over the slot tl erein by suitable meai'is` as the bolts 3; and the lower edge oli' said plate may be formed or provided with a recess -ll (Fig. l0) which eX- tends upwardly-'trom the lower edge thereot and in which said operating` shalt ll0 is reoeiyed. This arrangement provides meansl whereby said operatingshait't is secured positively in position and yet may be removed when desired upon removinpr said plate compression singing` t6 may be disposed to encirchz the lower portion ot' said eoi'ineetlili) lll) -lll

Lee-aaai ingr-od 38 and press against said insulating plate 1G whereby to bias the sivitci toward open position.

rhe stationary sivitch members are or may be identical in construction. Each member ma] comprise a strip or plate 4l of conducting material having the reneed foot l which is secured to the lower face ot the insulating plate le by suitable means as the bolt Said boltis adapted to be elec# trically connected with said conductingstrip 5.0 and pass through said insulating plate and form a terminal member o'i theisivitch. rThe middle stationary switch member may be providedL With a terminal lug` 53 by which connection `may be made with one Wire ot the motor or other circuit to be controlled. The outer switch members are adapted to be connected-With overload or tripping` coils as ivillhereinafter be descrioed Separate Contact members :tor the brush member and contact member of the movable switch member are or may be secured detachably to the stationary contact members. Said contact members may be of similar construction and may comprise lm-shaped members and which are disposed upon opposite sides ot the stationary switch member and are or may be secured to said member by the bolt 57. Said contact member 55 is adapted to be engaged by the brush member El() and said contact member 56 is adapted to be engin il by the movable Contact Vmember 29. S, contact members 55 and 5G are, preterab U detachably connectedl with the stationary switch member and maybe removed and replaced by other contact members ywhen Worn by use. y

The outer stationary switch members are or may be provided with lsl1aped attacliin members and 59 to which terminals ot separate overload tripping coils are adapted to be connected. Similar L-shaped attachinf; members 60 and 5ly are secured to the lower lace oi' said insiilatingT plate lGby suitable means as the bolts 62 and 63 and are adapted to be connected with separate terminals of the overload coils. Said bolts 62 and G3 are or may be adapted ,to support terminal hipjs ('35 and (r3 to which circuit leads from the motor or other device to be controlled may be connected.

The switch operating mechanism prel erably disposed beyond the main switch casing` and in a. separate casing disposed in front ot' and secured tothe iront Wall `ot the main switch casing' l0. lilaid casing; 70 is v or may be provided with a iront cwer plate '7l which may be secured t-o the casingin any suitable'manner as by the screws The switch operating` mechanism includes an actuating electro-magnet havingthe itlshaped laminated magnet traine 75. Angle irons 7G secured to i pposite sides of tile upper leg of said trame and may seri'ie as Atl'ireaded adjnstably in a block attaching` means by which the inf iniet is may `be secured to the upper Wall ot the casing 70. A coil 77 which is adapted to be camnected in slmnt across one plie e oi the circuit to be controlled, is' received on th lower leg` ot the magnet trame.

rlhe armature 78 et the electroanagnet is or niay be formed of laminas s ci/ed be tween side plates 79 which depend l'elow said' laminte.

ln accordance with this inve= 1i, said armature arrano'ed tobe loosely pivotally supported and tor this purpose, the opper end' oif said armature is or may be formed with the elongated and, prelierablyj arcta-rte pivot slot 80 therein threrlgh which and said angle irons 7 6 ot' the electroni et a pivot pin 8l is extended. The rrange ment is or may be such thatJ vhen said e tro-magnet is energized, said armature 7 moved to an attracted position in conta vitli both poles ot the magnet, and,` Whei'l the switch mechanism hereinafter to be described is actuated manually, said arm aiflapted to pivot on the lower pole ot the electro-magnet; and said pivotal movement is permitted by reason ci the slotl 8() whereby to permit the operating` mechanism to l' i 'locked releasably in switcheclosed position.

The switch operai o' mechanism includes the bell crank levers which are supported .in spaced relation loosely on the shaft and between the depending;` arms {it} oi" a si ppor ing 'trame Which is secured to the top Wall or the-casing 70. connecting rod 87 is ceived between the lower arms ot said crank levers Sli and is pivoted on a pin which extendsbetneen said arms. The end of said connecting; rod 87 is lor nfiay be 88 vvhich disposed between kand pivotally supported y on a pin 89 extended through the lower ends of the side plates 79 of the armature 755. lefith this arrangement, the bell crank lever will respond to movi-ments ot the armature 78. rthe iipper arms of said bell crank levers 84e are pivotally connected with. a link 90; and said link is pivotally connected with a depending arm l0() `which is `lixeil to the extended end ot the'sivitdi operating shaft lll). i

A pin Y101 may be extended bet-Ween the arms 845 ot the supporting bracket for the bell crank levers and serve as a stop whereby to limit the switclropen .position of said bell crank levers 'lNith this arrangement., whenV the electromagnet is energized, the armature vvill be attracted and the to(r `le comprising the bell lili) llt) said electro-magnet is adapted to be energized for so long as the switch is adapted to be maintained Closed.

Normally said switch is adapted to be aetuated by the electro-magnet. Means, however7 are or may be provided by which the sivil'eh may be opened and closed manually upon lz'iilure olf the eleetro-niagnet for any reason. Said means may include the shaft B which is or may be provided with a squared-emi 105 adapted removably to reeeive a key or other suitable, instrument by whieh the shalt may be rotated; and said key may l e inserted through a Suitable openingl 'termed in the iti-ont eover plate 71 olf the easing T0. tilaid shalt is or may be 'formed or provided with an extension, as a pin 106, extended on opposite sides thereof and disposed betwef-mSaid bell. crank levers 841. A pin 10T ie extended between. and Connected to laid bell erank levers and adapted to be engaged by the oppofsite ends' of said pin 106 lor the purpose o'if aetuating the Switch operating); iiieelmiiieii'i manually. Said Shat 85 is adapted to be .rotated in counter-clochwise direction (Fig. to cause one end of said pin 10G to engage said pin 107 and move the toggle eoi'nprising the upper arme of the bell eranlr levers and said link into ah somewhat over-shot. position whereby to hold the switch releasably in switch-cloned position. Means are or may be provided to hold said toggle in over-shot position and said means may inelude the pin 10S secured to Said bell eranh levers and movable in a slot 109 formed in said link 90; and said pin in adapted to engage the bottom wall ot' Said slot whereby to restrict the movement ot the toggle members. lllhen said Shaft S5 .ie rotated manually in a eloekwir-:e direetion, the other end ot Said pin 106 ie adapted to be moved into eontaet with said pin 10T carried by the bell Crank levers and move Said toggle over the on-eeuter position thereo'lf, whereby the spring' 110 nerves to move the nwiteh members rapidly into open position regardless ot the rate. oil movement and independent oi Said elialt "When the fswiteh operating meehaniem is' opeated manually to close the Switch, the armature 7S is adapted to pivot about the lower pole ot the magnet itran'ie )i whereby to permit the toggle to be moved to an over-Shot poeition,

amb in this positiom the upper end oi the ztrniature will be epaeed away lrom the upper pole ot the magnet trame. Tt the Coil 77 should become energized when the switch has; been eloex-d manually, Said armature will ie pulled against the poles7 ot' the magnet trame and lthereby move the toggle across on-eenter position and,-consequently, when Said eoil is de-energiZ-ed, the switch will move to open position autoniatieally.

The eireuitthrough Said actuating coil 7"? adapted initially to be completed by a remotely-disposed Controlling @witch whereby to close the Switeh and the @witch provided with menne to maintain the eireuit cloned until it is interrupted by the remotely-dispozlied controllinel ewiteh or by the trippingr coils.. Said menne may inelude an :iuriiliary :switch or eireuil; controller aasioeiated with the oil inviteh. tlaid auxiliary enviteh nn y comprise a resilient movable eontaet member 110 which may be eeeured to one oli the eendueiinp` Stripe 2T ol a movable ewi teh member, tor 'inearee7 the eonduetine` Strip ot the middle movable :nviteh inember. Said strip 110 or may le provided with a reflected portion 111 which is adapted to make Contact when the switch in olor-lied with a contact meniber 112y detaehably earried by a conducting support 113, which eupport in or may be diepeeed in line with and insulated from the middle Stationary :iwi teh member and secured to Said linfailatilrrg` plate 16 by the bolt 114-` which forme a terminal member 'tor the ,fixed contact member 112. iaid resilient Contact member 110 ie or niay be provided with an insulating bloeh 1145" which is or may be secured removably to the end thereof; and said ii'ieulatingl bloeh 111 is adapted to be engaged and (lepre d by the movable member ot the overload eoilf; whereby to interrupt the eireuit olf the aetnating` eoil 77, upon overload, and thereby eflieetthe openingo'l the switch.

Said overload or tripping coils are or may be Carried by a tripping` :tranie illustrated more elearly in Figs. 11 and 1). Said tripping; 'frame iS or may be composed ot a Single 'flat strip of metal reitlexed to form the integral top and bottom walls 115 and 110 respectively and the side eonneeting wall 11T. Said top wall 115 or may be 'termed with the upwardly extended e: 118 whieh are or may be secured to the front and rear walls of the main easing port-ion 10. Said -traine isor may be disposed on the easing;- with the top wall 115 diepoeed Substantially in line with the insulating plate 10 whereby to vomplete the closure t'or the oil receptacle. 'iuid Connecting;` wall 11T may be 'formed with the rearwardly extended eure 1.10 lor :i purpoee not connected with tlue invention. tlaid lower wall 110 if; adapted to euinfiort the tripping eoils 120 two oit wliieli are here Shown. Said tripping' eoils 120 may inelude center tubee 121 whichv are or may be of insulating material. Said tubes are preierablj,Y slidalily received in apertures ot sai d lower wall 11G and the upper ende of Said tubeeI are or may be Secured to the upper wall 115 in a suitable manner, as by the sereivs 193. lV ith this arrangement, the tripping; coils; may be removed from position by removine` the Screws 123 and withdrawine` the tubes 121 dowmvardly out ot the tripping coils and Ylfree from the supportingf frame.V Plungerfr; 125 are or may be movably received in said cores 121 and may be provided with suitable retardation devices whereby to delay the operation of the tripping coils. Said plungers are adapted normally to rest upon and be supported by a Vplate 126` which is disposed beneath both plungers. Said plate `is or may be carri-ed by a vertically-extended arm 127, which `atter is slidably received and guided tor vertical movement in slots 128 formed in the top ,and bottom walls 115 and 11G ot the supportinpV trame. Said plate 126 is adapted to be adjusted vertically enf. clamped by suitable means (not necessary to describe herewith) whereby to vary the current setting); oi the tripping coils. Said coils are adapted separately and also conjointly to operate a iii-shaped tripping' vtrame 130, which is or may be pivoted to depending); ears ..31 `formed preferably integrally with the bottom wall 116. Said tripping' trame is or may be formed with arms 132 vhich are disposed above and are adapted to be engaged by striking' discs 133 carried by the pluntfijers of said 'tripping coils, whereby to actuate said tripping frame. 'Said tripping` 'traine is adapted toengagethe insulating block 114i carried by the resilient Contact member 110 included in the actuating' coil 4circuit and depress said Contact member 'from engagement with its cooperating' stationary contact member` whereby to interrupt the circuit through the actuatingcoil and therebyetlect the opening' of the switch.

Said mechanism-containinp` casing TO is or may be provided with Ventilating means whereby to Mfacilitate the cooling of the 'actuatingl coil. Said Ventilating means may include one or more openings 11i() disposed in the bottom wall ot said casing` ZO beneath the actuating coil. The side walls oli said casino1 T() may be provided at one or both ends with one or more openings lill in tlieupp'er portion thereof. rlheiarranpgement of said openinps is or may be such that a draft through said casing and about said actuating` coil is set up due to the heating thereot. whereby to promote the cooling` oi" said coil.

Figi". t5 is a diagram ot the control circuits ot the switch. rllhe remote control switch may include a circuitclosinpv switch l5() which is adapted to be momentarily de pressed to close its circuit7 whereby to e'liect the closing ot the switch; and a circuit-openinc` switch 151 which is adapted to be mo* mentarily depressed whereby to interrupt its circuit and elliect the'opening; ot the switch.

The circuit connections are or maybe so arranged that when said circuitclosing` switch 150 is depressed, a circuit is completed through said actuating' coil 77 and the circuit-opening switch 151 'between twophases ot' the line circuit. The oil switch is then closed by said coil 77 and the Contact member 110 yis moved, by the closing' of the oil switch, into Contact with its cooperating contact member 112 whereby to shunt said circuit-closingswitch 150 and maintain the circuit complete through said actuating coil 77 whereby to maintain ther'switch closed. llilhen the circuit-opening switch 151 is depres-e the circuit tlirough said actuating' coii .77 is interrupted and the actuating coil isilelcnergiaed and the oil switch is conseyently moved to open vposition and the 'Lary contact members which control the actuatingl coil '75 are separated whereby to maintain the circuit of the actuating coil Vintcrruptcd until the remote circuit-closi'ng` switch 150 is again actuated'.

Upon overload, said tripping' coils actto sepa-rate. the auxiliary contact members, whereby to deencrgiac the actuating` alud holding coil 7i' and effect the opciiingr oflitho switch; and the remote circui12-closingr switch .1:30 must then be depressed to etl'ect the reclosing of the. switch.

An indicating member, as the plate lo()5 may be secured to the end ot the operating` shaft 10 and bear suitable indicia thereon which may be visible through a suitable aperture in the front cover plate ot' the casino; Yllto indicate the closed or open condition o'the switch.

is obvious that theconstr'uction may be otherwise modilied without departing from the spirit ot therinventionu l claim: Y

1. An electric switch having` the combination ot a supporting` plate7 a supporting` bracket carried by said plate 4and having depending arms, a bolt passed through said bracketand plate wherebyT to connect said bracket with said plate, said bolt having` a head disposed between said arms and adapted to be held againstrotation by said arms7 a channel member pivotally connected with Ysaid arms, a brush member carried by said channel member, and a flexible conductor connected electrically with said brush member andthe head of said bolt.

2. iin electric switch having the combination of a movable switch member comjjrising two contact men'ibersj and a sitationary switch member comprising` a depending` supportingl plate, a separate stationary contact member :for each movable Contact member disposed on opposite sides ot' and bearing said plate, and a common connecting means for both statioi'iary contact members pesi-"led through both Contact members and said plate and arranged to secure said Contact members detachably to said support.

An electric switch havingthe combination. of a movable switch member comprising` two Contact members7 and stationary switch member comprisingl a support, separate stationary Contact members lor .said movable contact members disposed on opposides ot said support,` and securing lil) lll() means passed through both stationary contact members and said support.

1l. An electric switch having` relatively movable switch members, operating mechanism therefor, electrically-operated means for actuating said operating mechanism, and 1nanually-operated means 'lor actuating said operating mechanism to close and open the switch, said manually-operated means having lost-motion connection with said operating mechanism.

5. An electric switch comprising the combination of a supporting plate, a movable switch member disposed below and pivotally supported by said plate, an operating shatt rotatably supported above said plate. a con necting rod extended through said plate and connected with said operating shalt and movable switch member, a spring encircling said connecting` rod ar anged to bear against said supporting plate and bias the switch toward open position, operating mechanism including toggle members connected with said operating shaft, and manually-operable means to actuate said toggle members to open and close the switch, said manually operable means having lost motion connection with said toggle members and arranged to move said toggle to an over-shot position, whereby releasably to hold the switch closed., and break the toggle whereby to eilect the opening movement et the switch independdently ot a corresponding movement ot said mannaily-operable means.

G. An electric switch comprising the coinbination ot a supporting plate, a movable switch member disposed below and pivotally supported by said plate, an operating` shaft rotatably supported above said plate, a connecting rod extended through said plate and connected with. said operating shatt and movable switch member, a spring encircling said connecting rod arranged to bear against said supporting plate and bias the switch toward open position, operating mechanism including toggle members` connected with said operating shaflit, and .ii1anually-operable means to actuate said toggle members to open and close the. switch, said manually operable means having lost motion connection with .said toggle nienilioril and arra njed to move said toggle to an over-shot position, whereby releasably lto hold the switch cleseil.y and breal; the toggle whereby to etl'ect the opening movement ot the switch indepenib ently ot a corresponding movement olf said manually-operable means. and electricallyoperated means connected with said toggle arranged to operate the switch indepead ently ot said manually-operable means.

7. An electric switch having the combination ot a movable switch member, operating mechanism 'therefor including a. toggle. and electricaily-operated actuating means arranged when energized to straighten said toggle and hold it in such position, whereby to close and hold closed the switch, and relrase said toggle when (le-energized, whereby to permit said toggle to open and eli'ect the opening ot the switch.

8. an electric switch having the combination ot a movable switch member, oper ating mechanism therefor including a toggle,

electrically lernte/tl means ari Vnged to move said toggle to less than an on-center position whereby to close the switch, and hold said t gle in such position to maintain the swit h closed, and maniially-eper and means ar 'g' d to move the toggle to an overshot position whereby relcasably to lock the switch closed.

S). An electric switch having the combination ol? a movable switch member, operating.' mechanism thoretor including a toggle,

electrically operated means arranged to move said toggle to less than an on--center ber connected with said 'toggle and governed by said electro-magnet to actuate sai l le and holdv it in actuated position to hold nie switch closed, and also governed by said electro-magnet to release said toglierlo and eiliectthe opening ot the switch.

il. An electric switch having the combination of a movable switch member, operating mechanism therelor including a toggle. niet trically operated means tor said togijfile in-v cluding a holding coil` a movable member connected with said toggle and ijoverneil b v said coil, said mechanism and coil arranged to hold the switch closed while said coil i1: energijied and eliioct the opening oi' the switch lupon de-energination oil said coil.

l2, An electric switch [lacingl the comhimn tion ol2 a movable svvitrh membri', mieralir mechanism theretor inclinling` :i lI cialed with said switcn member, a l

lever pivotally connected with raid i i i and arranged to 'term a toggle therewithn aud electrically-operated actuating means i'or said operating meehaiiism inclidlingl :in elen-v troanagnet, and an armature there 'or counected with said belleranl lever.

18. An electric switch having)` the combinie tion et a movable switch nunnber, operatingl mechanism therefor including a linl; asso-- ciated with said switch men'iber, a bell-c fault lil) lever ijnivotallv connected with Said link and aranojed to torni a toc/gne therewith, and electricallvoperateil actuating meane tor said operating mechanism includingIv an elee- 'tro-magnet, a loosely pivoted armature there'tor, and a li ik connecting` said armulure and hell-cran lever.

l5. fin cf'rie switch having the combination ot a n'iova ile mvitch member, ope ating` mechanism therefor including a. link associated with said switch memher, a hell-crank lever pivotally connected witl'r said link and arranged to term a toggle therewith7 and electrically-ope*ated actnatin` meane lor said operating; mechanism including an elec!roonagnet, an arnmture' therefor, a link pivoed to said hell-crank lever, and means adir tahly connecting said link with said ature.

arm

lll. in electric. switch liavirml the combina` tien oit a movable switch memhe'r, operating' mechanism therefor including` a link associated with said switch member, a `loellrank lever pivotallv connected with saidv link and arran'ed torni a toggle therewith7 and electriwilly-operated actuating@` means tor seid operetinej mechar' n including an electro-n net, an armature. therefor, a link iiiivotet to said hell-c ank lever9 and means ad'uiuasmihly connecting said link with said armature, said means comprising a block pivotally supported hy said a mature and j; adjustable ,s ifrcwhreaded connection i n Switch having` the combinar in rvahle switch member, operating ism therefor including a link asso-v 7ith seid switch member, a hell-crank bretellv coi ected with said link and d to Yterm a toggle therewith, and ally-operated actuating` means for said operating mechaniein includiin;` an electro-igiafrnet, :in armature disposed adjacent he riolen et said electro-magnet, and having` one end extended bevond one o'j the poles ther` mel `ns arranged pivotally to support the other end Qt said armatmfe loosely adjacent the other pole ot said electro-magnet, l a link connecting` the extended end et AWl armature and sad hell-crank lever.

l8. An `eleftric switch having' the combination ot a movable switch memhen operating` mechanism therefor including a link aseoelated with said switch mr-rmloer a hell-crank lever pivotally connected with said link and arranged to form a toggle therewith, and electricallvoperated actuating means 'tor said operating mechanism includ-.ing` an elec-- tro-magnet, un aru'i'atiire disi'iosed adjacent the poles of said electro-magnet and having one end ex'ended beyond one oit the po thereo'i means arrar crank lever pivotally connectedL with said link and arranged to form a ti `le there wit-ln and electricallvoperated actuatingy menne tor said operating mechanism including;- an electroemagnet, an armature disposed adjacent the poles oi: said electro-inf` 'j' having one end extended beyond one ot the poles thereof, means arranged pi.f'otlll)r to eiipi'iort the other end et said armati loosely adjacent the other :pole of said electron'iayinet, and permit that end thereof Ato movel on ite pivotal support toward and away 'trom the electro-niagnet7 a link nivoted to said hell-crank lever and said armature a means connecting said link adjnstablv w" said armature, said means com?) `:incv block pivotally snpgerted h v the entend end ont said miniature and havingi adjuf nation ot` a movable switch ineineer7 operatino1 mechanism therefor including" an open ating' shaft connected with seid switch meinher, a link pivo'tallv connected with said shaft, a hell-crank lever pivotally connected with said link and arranged to 'form :i t' therewith, and electricalliv-operated actuelI ing` means for said opeinting mer-,ns including' holdingv elecroenzrgejneh and an :ii-mu ture therefor connecte'L Vith Seid hell-crank lever, said electro-magnet arranged 'to he energized 'to hold said toggle and the switch closed7 and release said tonele and permit the switch to open when de-energgined An electric switch heving the combi nation et a movable switch memhe oneratino; mechanism theretor including' a link associated with said movable switch meniher, lever pivotally connected with said link arranged to form a toggle therewith, a manuallvoperahle shalt on which nifl lever is supported, andmeans connecting; said shaft and lever arranged to move the toggle to an over-shot position whereby releasahlv to hold the switch closed, and break Said toggle whereby to eliiect the opening; oi the Switch. i

Q2. ilu electric switch having the coinbination of a movable switch member, oper ating; mechanism there'lor including` a linl oai-:ooiafxted with itl movable switch member, z` lever pivotally connected with Said linl; and arranged to form a to 'le therewith, e menually-operzible Shaft on which Said .lever is loof-:ely eupportecl, and means loosely connecting` said sha'l't and lever arranged to move the toggle to an over-Shot poeition whcfeby releesablv to hold the Switch cloeed, sind breali the tonele whereby to permit` the Switch to open independently oli a corresponding' movement ot Huid Shaft.

l. fin electric witch harinev the combinction o'lE a movable `ewitrh member, open ating mccheniem there''or including a linl ociated with said switch member, a bell lever pivotallyY con ezid fnl: and erraneed to tori le theree manuallyoperoble ehr-,tft on which Jell-crank lever looeely supported, Shaft having; lost-motion connection faid bell-cranlr lever, and, said eh tt arj il to move the to an overehot "'on whereby releasal'ilv 'ti hold the l i cloeed, sind break the toggle whereby iernnt the switch to open independently corresponding movement ot said shalt, and electrically-operated means tor Srid ops re; mechaniem including` a holding,l electro-nouajnet aranged to aetuate said bellcranl; lever and hold. the Switch closed while encrriz/,ed and release the operating' mechanism and permit tbe switch to open when said magnet. is (le-energized.

iin electric Switch having` tie combination ot a movable Switch member, operating mechanism therefor i1 clutling; a toggle, electrically-actua'ed mechaniem including o i'novable member connected with Said toggle :ind having,` two 'liulcrnnie about which it muy pivot, an electro-.magrnet arranged, to pivot said movable member about one ot .eraiil l'ulcrnms 'to :ictnae :said toggle, whereby to clone 'the inviten electrically, and nmmiallysscnntcd meant-i arranged to pivot said mornble. member alj=ont said other toggle, wherebyY lo rior-:e the switch manually.

,-rn electric envitch havinothe combh i` movable iewiteh n ,i iber, oper- I mech inism thereiior including a toggle, elemically-actiorteil meclntninm for operatine said tooo'le, whereby to close the switch,

Said electrically-actuated mechanism ha Ying an armature and two 'tulcrum Supporte there# tl r and connection between Said armature :1 tingle, said arinaturi ar angled to pivot about one ot said tulcrume and move Said oggg'le into a position less than an oni-center msuion and hold said toggle in Such position during the enorgization ot Said elect-rihold the switch cl ined. 7

2G. An electric @witch having;- the combination of a movable Switch men'il'ler, operating;v mechanism therefor includingv pivotecl links comin-lenig); toggle nien'ibere, one ol Said links having o. said linke having a projection arfangcd to enter said receso, whereby to hold said toggle in Streio'htened poeition, and actuating,l

said ti Xsrlc, whereby to opmeehan m J{or crate it to close und open the switch.

ln electric switch comprising the combination oi" a movable switch member, operating ineane therefor inclmlinov a toggle, nl ectrli'feillynctnated, toggle-operating means including' an elcetro-magnet, an armature the jor, a pivmal support :tor said armature and menne connecting' Said armature and toggle, said electrically actuated, toggle-opmeans having a lost-motion connece tion in ita and said means arranged to hold aid ton` le in eet positon whereby to hold -e enrich closed, and manually@ctueted ezine to actuate eaitl toggle, said manuallytuated means; having a lont-motion connection between it and said toggle and arranged to move Said toggle to an over-shot position, 'whereby releasably to hold the switch clofsed An electric Switch having` the combination ot e movable switch member, operatin` mechanism tl erelfor including a toggle, electrically-actnated mechanism 'tor operating said toggle, manreilly-actuated mechaniSm tor operating Said toggle, both olf Said niechai'iiems having lost-motion connections; arranged to permit said toggle to be moved manually to an over-shot position, whereby releasably to hold said Switch cloeed`r and permit the Switch to be opened immually independently ot a corrcspomling movelnei'it ol said manually-:ictliatcd mechanism.

2S). An electric switch having' the combination. ot a mo y'able ewitch member, operoting; mechanism therefor including` a togo-le, manually-actuated to phi-operating mecha- .niv-n1 arrenggjed to more the tegole lo en over- Sihot position, wherrfiby releus-:ably to hold the :switch closed and el eti-ieL lly-a i^luated toy;- nle-oiieroting mechanism having' menne lo more Said tol* 'o a position in which the s viteh ie free to open, and hold it in such a position during' the energization ot said electrical] Y-actuated mechanism, whereby to hold the l@witch recess therein, and the other ol T gle from :said overehot position X tri.

closed. l 3

30. in electric switch having` the eonibination ot a movable switch member, operating mechanism therefor including a link connected with Said. switch member. :i belle'eranl lever pivotally connected with said link 130 and arranged to torni ak toggle therewith, a manually-actuated rotatable shaft arranged loosely to support said bell-cranlr lever, said shaft having a projection extended thereiirom adapted toene` projection ot said bell-crank lever, wh y to move said t to an over-shot position and close the and move said toggle ont t' said ove?. position and permit the 3h tonnen' from said shaft, electricallyactuated mechanism for said operating mechanism including an electro-magnet. an armatore the. is' having the upper end thereoie loosely pivoter adjacent the upper poles said electro-magnet, whereby that end ot the arn'iature is permitted movement towardanl away trom the upper pole of the electro-magnet, said armature having its lower end er ended beyond the lower pole ol? said electromagnet, said armature arranged to contact with both poles ot' said electro-magnet inthe attracted position thereof, and a link pivotally connected with said bell-cranlrlever and the extended end ot said armature, the arrangement being such thatsaid armature can tulcrum about its pivotal support and also about the lower pole of said electromagnet.

3l. An electric switch having the combination of switch-operating meclianism, including an actuating electro-magnet, a circuit-controller governing the circuit ot said electro-magnet, and a switchwtripping coil arranged to actnate said circuit-controller and effect the opening oi the switch, said switch-operating mechanism also having means to operate said circuit-controller.

32. An electric switch having the combination of an enclosing casing, switch members, a circuit controller, and a switcli-tripping coil all contained in said casing, switclioperating mechanism including an electromagnet arranged to close the switch and hold it closed when energized and effect the opening of the switch when fle-energized, said circuit controller arranged to govern the circuit of said electro-magnet, and said switch-tripping coil arranged to actnate said circuit-controller, whereby `to el'lect the opening of the switch, said switclroperating mechanism also having means to operate said circuit-controller.

83. An electric switch having the combination of relatively movable switcli-1nembers, operating mechanism therefor including an electroanagnet arranged to close the switch and hold it closed when energized and et feet the opening of the switch when de-energized, a circuit-controller tor said elcctromagnet, and a switch tripping coil arranged to govern said circuit controller and etlect the cle-energizat-ion ot said electro-magnet, whereby to etect the opening ot the switch, said switch-operating mechanism also having means to operate said circuit-controller.

34. An electric switch having the combination or relativelymovable switch-members, operating mechanism therefore including an electro-magnet arranged to close the switch and hold it closed when energized and eii'ect the opening of the switch when cle-energized, a circuit controller actuated by said operyatinpl mechanism ai d arranged `to Uovern said electro-magnet, and a tripping coil arranged to actuate said circuit controller, whereby to effect Lthe opening ot the switch, said switch-operating mechanism also having means to operate said circuit-controller.

85. [in electric switch having the combination ot a movable switch member, a cooperating` fixed switch member therefor. an auxiliary switch having a movable member electrically connected and movable with said movable switch meinbeig'and a lixed switch member cooperating with said movable anxiliary switch member', switch operating mechanismincluding a holding` electro-mag net governed by said auxiliary switch arranged to close the switch and hold it closed while energized and a switch-tripping` coil arranged to act-nate said movable auxiliary switch member whereby to de-energize said holding coil and eliiect the opening of the switch.

36. An electric switch having the com* bination of a movable switch member, a cooperat-ing fixed switch member, an auxiliary switch comprising a flexible contact member carried by and electrically connected with said movable switch member, and a cooperating iiXed contact member, switch operating mechanism including a holding electromagnet governed by said auxiliary switch and arranged to close the switch and hold it closed when energized and a switch tripping coil arranged. to flex said auxiliary `flexible contact member away from contact with said cooperating auxiliary Contact member, whereby to eiilect the opening of the switch.

37. An electric switch having the combination of a movable switch member, a fixed switch member cooperating therewith, a contact member carried by and connected electrically with said movable switch member, a contact member cooperating withy the aforesaid contact member and insulated from said vfixed switch member, and means 'to separate said contact members without actuating said switch members.

38. An electric switch having the combination ot' a movable switch member, a lined switch member cooperating therewith, a. contact member carried by and connected electrically with said movable switch member, a contact member cooperating with the aforesaid contact inember and insulated from said fixed switch member, a holding coil governed by said contact member arranged to hold the switch closed when energized, and a trip coil arranged to separate said contact members and cle-energize said holding coil, whereby to effect the opening of the switch.

39. An electric switch having the combination of a movable switch member, a fixed switch member cooperating therewith, a contact member carried by and connected electrically with said movable switch member, a contact member cooperating with the aforesaid contact member and insulated trom said fixed switch member, a holding coil governed by said contact member arranged to hold the switch closed when energized, and a plurality of trip coils having means independently and also conjointly to separate said contact members and Cle-energize said holding coil, whereby to eifect the opening of the switch.

40. An electric switch having the combination of a plurality of movable switch members, cooperating iiXed switch members, an auxiliary contact member carried by and connected electrically with one of said movable switch members, a fixed Contact member cooperating therewith and insulated from said fixed switch members, switch operating 5 mechanism including a holding coil governed by said contact members and arranged to hold the switch closed when energized, and a trip coil arranged to separate said contact members and cle-energize said holding coil, whereby to eifect the opening of the switch.

41. An electric switch having the combination of a plurality of movable switch members, cooperating fixed switch members, an auxiliary contact member carried by and connected electrically with one of said movable switch members, a fixed contact member therewith and insulated from said fixed switch members, switch operating mechanism including a holding coil governed by said contact members and arranged to hold the switch closed when energized, a plurality of trip coils, and a tripping frame actuated by said trip coil arranged to separate said contact members, whereby to cle-energize said holding coil and effect the opening oi the switch.

In testimony whereof, I have signed my name to this speciication.

GEORGE W. OKEEFFE. 

